In an exam, the maximum marks for Maths, Chemistry, Physics, Geography, History, and Computer Science are 150, 130, 120, 100, 60, and 40 respectively. The percentage of marks obtained by Ajay in these subjects are 90%, 60%, 70%, 70%, 90%, and 70% respectively. What was the aggregate of marks obtained by Ajay in all six subjects?

In a data table, the production of rice for country Q and country R is 60 lakh tons and 54 lakh tons respectively. The production of wheat for country S and country T is 52 lakh tons and 52 lakh tons respectively. What is the ratio of the total production of rice of countries Q and R to the total production of wheat of countries S and T?

In a survey of 5 countries (P, Q, R, S, T), the rice production values are 40, 60, 54, 70, and 51 lakh tons respectively. What is the average production of rice (in lakh tons) across all 5 countries?